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Summary The Currarino triad is a complex anomaly consisting of an anorectal malformation, a sacral bone defect and a presacral mass. It was first described in 1981 and since then, approximately 250 cases have been reported. Radiology has an important part to play in the diagnosis of this entity, as the imaging features are characteristic. We report a case of Currarino triad in an infant who presented with intractable constipation and discuss relevant MRI and plain radiography findings.

SUMMARY 16 cases of primary sacral bone tumours in children are reported. These include 13 patients with Ewing's sarcoma and 3 with very rare primary sacral bone tumours in childhood — chordoma, haemangiopericytoma and osteoblastoma. All sacral bone tumours, with the exception of Ewing's sarcoma are very rare in childhood. The possibility of a sacral tumour should be considered in a child with radiculopathy. CT and MR make the diagnosis of primary sacral bone tumours much easier with the added possibility of recognition of the true nature of the lesion in many instances. Reports of primary sacral bone tumours in children are scarce. Most of the patients are incorporated in adult series which do not specify the age of the child and the site of the tumour. The purpose of this paper is to describe 16 children with primary sacral bone tumours.